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<head>
    <meta charset="UTF-8">
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    <title>箭头函数</title>
</head>
<body>
    <script>
        // 1.将数组map，filter，reduce，every改写成箭头函数形式

        const arr = [1, 2, 3, 4, 5, 6]

        // const arr1 = arr.map(
        //     function (element) {
        //         return element + 1
        //     }
        // )
        const arr1 = arr.map(
            (element) => element+1
        )

        // const new_arr = arr.filter(
        //             function (e){
        //                 return e%2==0  //true：返回 false：不符合条件=>过滤
        //             }
        //         )
        const new_arr = arr.filter(
            (e) => e % 2==0
        )
        // var sum = arr.reduceRight(
        //             function (v1,v2){
        //                 return v1*v2
        //             }
        //         )
        var sum = arr.reduceRight(
            (v1,v2) => v1 * v2
        )
        // var isMatch = arr.every(
        //             function (e){
        //                 return e>1
        //             }
        //         )
        var isMatch = arr.every(
            (e) => e > 1
        )
    </script>
</body>
</html>